disclosed is a welding beam driving device (50), an electrically conductive anodenku00f6rper (52) has a anodenhohlraum is trained (54) of a central axis (58) symmetric nozzle (56) are defined. the anodenhohlraum has tandemartig ordered a divergent rekombinations area (60), and a divergent expansion area (62).the expansion area has a larger divergence degree than the rekombinations area. the anode body is preferably further upstream and tandemanordnung with the rekombinations area of a cylindrical verengungs area (64).a cylindrical cathode electrically executive body (66) is coaxial with and arranged through a gap (68) beabstandet of the anode body. with the cathode and the anode, an associated electrical power source (72) creates a rift as electric arc (74).one of these treibmittelgas (76) used to generate power through the gap and through the nozzle insertion. the treibmittelgas - these are the arc through the narrowing in the divergent areas of the nozzle.$a rekombinations and expansion areas meet at a transition (78), between a divergence of 5 and 15 degrees and within a diameter ratio range of transition: narrowing of about 1.5 to 4.0. $a of divergent rekombinations area causes a t because of the...
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